Method for excessive heating protection of petrol engine catalyst

A gasoline engine, overheating protection technology, applied in engine components, engine control, engine ignition, etc., can solve the problem of lowering, not considering catalyst conversion efficiency, etc., to reduce harmful gas content, prevent catalyst overheating phenomenon, and improve emission standards Effect

Inactive Publication Date: 2010-06-16
CHINA VAGON AUTOMOTIVES HLDG CO LTD
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  • Abstract
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Problems solved by technology

[0006] At present, most of the existing research results aim to increase the temperature of the catalytic converter in various ways to achieve the effect of exhaust gas purification, without considering the fact that the conversion efficiency of the catalyst will decrease due to the overheating of the catalyst when the temperature is too high

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  • Method for excessive heating protection of petrol engine catalyst
  • Method for excessive heating protection of petrol engine catalyst
  • Method for excessive heating protection of petrol engine catalyst

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Embodiment Construction

[0027] The following embodiments are used to illustrate the present invention in conjunction with the accompanying drawings, but are not intended to limit the scope of the present invention.

[0028] The principle of the gasoline engine catalyst overheating protection method provided by the present invention is as follows: first, the engine crankshaft speed signal is collected by the crankshaft position sensor, the throttle opening degree signal is collected by the throttle position sensor, the engine temperature signal is collected by the water temperature sensor, and the engine temperature signal is collected by the intake air sensor. The temperature sensor and the pressure sensor detect the temperature, flow and quality signals of the intake air, and detect the knock state of the engine through the knock sensor; secondly, the ECU (Electronic Control Unit, electronic control unit) collects the engine crankshaft speed signal and the throttle according to the crankshaft sensor. ...

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Abstract

The invention relates to a method for protecting overheating of a catalyst of a gasoline engine, which utilizes ECU to judge parameters of rotating speed of an engine, a throttle opening and a water temperature collected by a sensor, an intake temperature, an intake flow and quality, and a set point modified by an ignition angle through modification of catalyst overheating; and utilizes the judgment result to control accurately a protection condition and prevent an overheating phenomenon of the catalyst to a large extent, thereby prolonging service life of the catalyst, reducing content of harmful gas in exhaustion and improving a standard of tail gas exhaustion.

Description

technical field [0001] The invention relates to the field of gasoline engines, in particular to a gasoline engine catalyst overheat protection method. Background technique [0002] When the gasoline engine is running normally, the exhaust gas after the combustion of the mixed gas in each cylinder is discharged through the exhaust pipe, and the exhaust gas passes through the front oxygen sensor, catalytic sensor and rear oxygen sensor at the tail of the exhaust pipe in sequence, and the exhaust gas passes through the catalytic converter to maximize the emission The transformation and purification of pollutants make the tail gas meet the emission standards. [0003] In order to make the content of hydrocarbons, carbon oxides and nitrogen oxides in the exhaust emissions meet the statutory requirements, the engine will start to heat the catalyst by correcting the fuel injection time during the warm-up process after the engine is started. When it is heated to 200 ° C ~ 300 When ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00F02P5/152F02D41/38F02D41/14
Inventor 李朝晖张步亮何文鑫高志远
Owner CHINA VAGON AUTOMOTIVES HLDG CO LTD
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